SNVSC48 October   2021 LP87745-Q1

ADVANCE INFORMATION  

  1. 1Features
  2. 2Applications
  3. 3Description
  4. 4Revision History
  5. 5Description (continued)
  6. 6Pin Configuration and Functions
  7. 7Device and Documentation Support
    1. 7.1 Receiving Notification of Documentation Updates
    2. 7.2 Support Resources
    3. 7.3 Trademarks
    4. 7.4 Electrostatic Discharge Caution
    5. 7.5 Glossary
  8. 8Mechanical, Packaging, and Orderable Information
    1. 8.1 Packaging Option Addendum
    2. 8.2 Tape and Reel Information

Package Options

Mechanical Data (Package|Pins)
  • RXV|28
Thermal pad, mechanical data (Package|Pins)
Orderable Information

Pin Configuration and Functions

GUID-D01BDC73-328C-4892-BBA1-B2A4B9A3E97C-low.gifFigure 6-1 Package28-Pin VQFN-HRTop View
Table 6-1 Pin Functions
PINI/OTYPEDESCRIPTIONCONNECTION IF NOT USED
NO.NAME
1SCK_SPIIDigitalClock signal for SPI interface.Ground
2SDO_SPIODigitalOutput data signal for SPI interface.Floating
3FB_B1AnalogOutput voltage feedback (positive) for BUCK1.Ground
4CS_SPI/WD_DISIDigitalPrimary function: Chip select signal for SPI interface.Ground
IDigitalAlternative programmable function: Watchdog Disable Input.Not applicable
5AGNDGroundGround.Ground
6NRSTOUTODigitalReset output.Floating
7nINTODigitalInterrupt output and CAN PHY control or both.Floating
8SDI_SPIIDigitalInput data signal for SPI interface.Ground
9VIO_LDOAnalogIO supply from the internal LDO or from external source. LDO enabled: regulator filter node. LDO disabled: input for connecting to an external IO supply source, with input filtering capacitor placed.Not applicable
10VOUT_BSTAnalogBOOST enabled: BOOST output (internally connected as VIO_LDO input). BOOST disabled and VIO_LDO disabled: short with VIO_LDO. BOOST disabled and VIO_LDO enabled: input for connecting to an external supply used as VIO_LDO input. External supply
11SW_BSTAnalogBOOST enabled: BOOST input. BOOST disabled: short with VOUT_BST.Ground
12PGND_B3BSTGroundPower ground for BUCK3 and BOOST.Ground
13PVIN_B3PowerPower input for BUCK3. The separate power pins PVIN_Bxx are not connected together internally – PVIN_Bxx and VCCA pins must be connected together in the application and be locally bypassed.System supply
14SW_B3AnalogBUCK3 switch node.Floating
15ENABLEIDigitalProgrammable ENABLE signal.Not applicable
16nERR/GPO2IDigitalPrimary function: System MCU Error Monitoring Input. Ground
ODigitalAlternative programmable function: General Purpose Output signal (GPO2).Floating
ODigitalAlternative programmable function: Fault Communication Output signal (FAULT2).Floating
17FB_B3AnalogOutput voltage feedback (positive) for BUCK3.Ground
18VOUT_LDOPowerLDO regulator filter node. LDO is used for internal purposes.-
19AGNDGroundGround.Ground
20VCCAPowerSupply voltage for internal LDO. VCCA and PVIN_Bxx pins must be connected together in the application and be locally bypassed.System supply
21FB_B2AnalogOutput voltage feedback (positive) for BUCK2.Ground
22VMON1/GPO1AnalogVoltage monitoring input.Ground
ODigitalAlternative programmable function: General Purpose Output signal (GPO1).Floating
ODigitalAlternative programmable function: Fault Communication Output signal (FAULT1).Floating
ODigitalAlternative programmable function: CAN PHY control (CAN_DIS).Floating
23SYNCCLKINIDigitalExternal clock input.Ground
24SW_B2AnalogBUCK2 switch node.Floating
25PVIN_B2PowerPower input for BUCK2. The separate power pins PVIN_Bxx are not connected together internally – PVIN_Bxx and VCCA pins must be connected together in the application and be locally bypassed.System supply
26PGND_B12GroundPower ground for BUCK1 and BUCK2.Ground
27PVIN_B1PowerPower input for BUCK1. The separate power pins PVIN_Bxx are not connected together internally – PVIN_Bxx and VCCA pins must be connected together in the application and be locally bypassed.System supply
28SW_B1AnalogBUCK1 switch node.Floating